<script setup>
  import TitanCharts from "@/components/charts/src";
  import * as echarts from "echarts";
  let xaxisData = ["周一", "周二", "周三", "周四", "周五", "周六", "周日"];
  let yaxisData2 = Array(7)
    .fill(0)
    .map(() => parseInt(Math.random() * 100));
  const offsetX = 10;
  const offsetY = 5;
  // 绘制左侧面
  const CubeLeft = echarts.graphic.extendShape({
    shape: {
      x: 0,
      y: 0,
    },
    buildPath: function (ctx, shape) {
      // 会canvas的应该都能看得懂，shape是从custom传入的
      const xAxisPoint = shape.xAxisPoint;
      const c0 = [shape.x, shape.y];
      const c1 = [shape.x - offsetX, shape.y - offsetY];
      const c2 = [xAxisPoint[0] - offsetX, xAxisPoint[1] - offsetY];
      const c3 = [xAxisPoint[0], xAxisPoint[1]];
      ctx.moveTo(c0[0], c0[1]).lineTo(c1[0], c1[1]).lineTo(c2[0], c2[1]).lineTo(c3[0], c3[1]).closePath();
    },
  });

  // 绘制右侧面
  const CubeRight = echarts.graphic.extendShape({
    shape: {
      x: 0,
      y: 0,
    },
    buildPath: function (ctx, shape) {
      const xAxisPoint = shape.xAxisPoint;
      const c1 = [shape.x, shape.y];
      const c2 = [xAxisPoint[0], xAxisPoint[1]];
      const c3 = [xAxisPoint[0] + offsetX, xAxisPoint[1] - offsetY];
      const c4 = [shape.x + offsetX, shape.y - offsetY];
      ctx.moveTo(c1[0], c1[1]).lineTo(c2[0], c2[1]).lineTo(c3[0], c3[1]).lineTo(c4[0], c4[1]).closePath();
    },
  });

  // 绘制顶面
  const CubeTop = echarts.graphic.extendShape({
    shape: {
      x: 0,
      y: 0,
    },
    buildPath: function (ctx, shape) {
      const c1 = [shape.x, shape.y];
      const c2 = [shape.x + offsetX, shape.y - offsetY]; //右点
      const c3 = [shape.x, shape.y - offsetX];
      const c4 = [shape.x - offsetX, shape.y - offsetY];
      ctx.moveTo(c1[0], c1[1]).lineTo(c2[0], c2[1]).lineTo(c3[0], c3[1]).lineTo(c4[0], c4[1]).closePath();
    },
  });

  // 注册三个面图形
  echarts.graphic.registerShape("CubeLeft", CubeLeft);
  echarts.graphic.registerShape("CubeRight", CubeRight);
  echarts.graphic.registerShape("CubeTop", CubeTop);

  const option = {
    xAxis: {
      type: "category",
      data: xaxisData,
      axisLine: {
        show: true,
        lineStyle: {
          width: 1,
        },
      },
      axisTick: {
        show: false,
      },
      axisLabel: {
        fontSize: 20,
      },
    },
    yAxis: {
      type: "value",
    },
    series: [
      {
        type: "custom",
        renderItem: (params, api) => {
          const location = api.coord([api.value(0), api.value(1)]);
          const xAxisPoint = api.coord([api.value(0), 0]);
          const distance = 30;
          return {
            type: "group",
            children: [
              {
                type: "CubeLeft",
                shape: {
                  api,
                  xValue: api.value(0),
                  yValue: api.value(1),
                  x: location[0] - distance,
                  y: location[1],
                  xAxisPoint: [xAxisPoint[0] - distance, xAxisPoint[1]],
                },
                style: {
                  fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                    {
                      offset: 0,
                      color: "#152E89",
                    },
                    {
                      offset: 0.35,
                      color: "#088BFF",
                    },
                    {
                      offset: 1,
                      color: "transparent",
                    },
                  ]),
                },
              },
              {
                type: "CubeRight",
                shape: {
                  api,
                  xValue: api.value(0),
                  yValue: api.value(1),
                  x: location[0] - distance,
                  y: location[1],
                  xAxisPoint: [xAxisPoint[0] - distance, xAxisPoint[1]],
                },
                style: {
                  fill: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                    {
                      offset: 0,
                      color: "#152E89",
                    },
                    {
                      offset: 0.35,
                      color: "#088BFF",
                    },
                    {
                      offset: 1,
                      color: "transparent",
                    },
                  ]),
                },
              },
              {
                type: "CubeTop",
                shape: {
                  api,
                  xValue: api.value(0),
                  yValue: api.value(1),
                  x: location[0] - distance,
                  y: location[1],
                  xAxisPoint: [xAxisPoint[0] - distance, xAxisPoint[1]],
                },
                style: {
                  fill: "#088BFF",
                },
              },
            ],
          };
        },
        data: yaxisData2,
      },
    ],
  };
</script>

<template>
  <div class="chart">
    <titan-charts
      :options="option"
      @click="
        (e) => {
          console.log(e);
        }
      "
    />
  </div>
</template>

<style scoped lang="less">
  .chart {
    width: 100%;
    height: 300px;
  }
</style>
